CN112773461A - Protective umbrella and distal protective device for peripheral blood vessel - Google Patents
Protective umbrella and distal protective device for peripheral blood vessel Download PDFInfo
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- CN112773461A CN112773461A CN202110158236.8A CN202110158236A CN112773461A CN 112773461 A CN112773461 A CN 112773461A CN 202110158236 A CN202110158236 A CN 202110158236A CN 112773461 A CN112773461 A CN 112773461A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/09041—Mechanisms for insertion of guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22001—Angioplasty, e.g. PCTA
- A61B2017/22002—Angioplasty, e.g. PCTA preventing restenosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with a guide wire
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22081—Treatment of vulnerable plaque
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/32—General characteristics of the apparatus with radio-opaque indicia
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Abstract
本发明提供一种保护伞和外周血管用远端保护装置，涉及医疗器械领域，该保护伞包括近端显影环、近端支撑环、支撑梁和口袋状的弹性滤膜；多根支撑梁的近端均连接于近端显影环，且多根支撑梁两两间隔连接于近端支撑环；弹性滤膜的开口边缘连接于近端支撑环，且弹性滤膜的开口朝向近端显影环；在近端支撑环上设置有显影部件，或者，在近端支撑环上涂设有显影涂层；该外周血管用远端保护装置包括前述保护伞。本发明至少缓解了现有外周血管用远端保护装置存在的伞体结构在弹性滤膜入口处贴壁性差以及远端保护装置的伞体结构整体柔顺性差的技术问题，提高了手术安全性。
The invention provides a protective umbrella and a distal protection device for peripheral blood vessels, and relates to the field of medical devices. The protective umbrella comprises a proximal developing ring, a proximal supporting ring, a supporting beam and a pocket-shaped elastic filter membrane; All are connected to the proximal developing ring, and a plurality of supporting beams are connected to the proximal supporting ring at intervals; the opening edge of the elastic filter membrane is connected to the proximal supporting ring, and the opening of the elastic filter membrane faces the proximal developing ring; A developing component is provided on the end support ring, or a developing coating is applied on the proximal support ring; the distal protection device for peripheral blood vessels includes the aforementioned protective umbrella. The invention at least alleviates the technical problems of poor adherence of the umbrella body structure at the entrance of the elastic filter membrane and poor overall flexibility of the umbrella body structure of the existing distal protection device for peripheral blood vessels, and improves the safety of the operation.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a protective umbrella and a far-end protective device for peripheral blood vessels.
Background
Peripheral arterial vascular thrombotic diseases are a group of vascular diseases seriously threatening human health, the incidence rate of which has been remarkably increased in recent years, and the diseases commonly include arteriosclerotic occlusion, arterial thrombosis, aneurysm and the like, wherein: the lower limb arteriosclerosis obliterans is the most common vascular surgical disease, is the main cause of chronic lower limb ischemia, the incidence rate of the lower limb arteriosclerosis obliterans is increased with the age, the incidence rate of the lower limb arteriosclerosis obliterans below 60 years old is about 5.6%, the incidence rate of the lower limb arteriosclerosis obliterans reaches 15.9% between 60 and 70 years old, the incidence rate of the lower limb arteriosclerosis obliterans above 70 years old is about 33.8%, and the incidence rate of the lower limb arteriosclerosis obliterans of men is slightly higher than that of women. The lower limb arteriosclerosis obliterans have uncertain causes, hyperlipidemia, hypertension, diabetes, smoking and the like are main risk factors causing the lower limb arteriosclerosis obliterans, mainly die of cardiovascular and cerebrovascular complications, 5-year death rate of intermittent claudication patients is about 30%, and 5-year death rate of lower limb ischemia patients with resting pain, ulcer and gangrene is 70%.
The pathological basis of peripheral arterial thrombotic disease is the formation of atherosclerotic plaques in the limbs of the artery, leading to stenosis or occlusion of the lumen, and secondary thrombosis. The pathological changes are mainly manifested by atheromatous plaque formation of blood vessels intima, lipid deposition in early stage of the artery intima, fibrous plaque formation, necrosis of deep cells of the fibrous plaque, atheromatous plaque formation, atrophy and necrosis of tunica muscularis media in the artery, deposition of collagen fibers and calcium, no pathological change of the artery adventitia, atheromatous plaque and calcified plaque after atheromatous plaque formation can protrude towards the lumen, resulting in lumen stenosis or occlusion, leading to chronic ischemia of distal limb tissues, hemorrhage or rupture in atheromatous plaque, and the like, which can cause arterial embolism and acute limb ischemia. The clinical manifestations of the patient are intermittent claudication, rest pain, ischemic ulcer and gangrene of limbs, and the main signs are decreased skin temperature of the extremities, weakened or disappeared arterial pulsation of the lower limbs, decreased systolic pressure of the arteries of the lower limbs, changed skin nutrition disorder, including thin skin, hair loss, deformed nails, etc., ulcer of limbs, gangrene, etc.
Interventional intraluminal treatment has the characteristics of less trauma and lower requirements on the physical condition of a patient compared with the traditional surgical operation, and in recent years, with the development of medical materials and imaging technology, intraluminal treatment has been widely applied to the treatment of peripheral arterial vascular embolic diseases.
Percutaneous balloon angioplasty and stent placement are one of the main means of intracavity treatment, and the principle is that the blood vessel stenosis is relieved through the physical expansion of a balloon and the radial supporting force of a stent, an atherosclerotic plaque is pressed to the artery wall, the internal diameter of the blood vessel of the stenosis section is increased, and the blood supply of the far end of a limb is improved. But after years of clinical application, the long-term vascular patency rate of the skin balloon angioplasty and the stent implantation is not ideal, the rate of intervention treatment is higher, the effect of treating a short section of lesion with the diameter of less than 3cm is better, the 5-year patency rate can reach 75%, but the long-term patency rate of stenosis and occlusion lesion with the length of less than 3cm is not ideal, the 6-month patency rate of a narrow lesion with the diameter of less than 7cm is 86.8%, and the 6-month patency rate of the narrow lesion with the diameter of more than 7cm is only 23.1%.
In order to overcome the defects of the saccule and the stent in lower limb arterial lesions, a plurality of novel interventional devices such as a catheter suction embolus technology and a plaque cutting technology appear in recent years, and are widely used clinically due to novel design concepts. However, regardless of the catheter suction technology or the rotational atherectomy technology, calcified plaque in an arterial lumen can be broken during the thrombus removal process, and the broken plaque is easy to block a distal arterial blood vessel, so that the risk of necrosis and amputation of distal tissues caused by blood non-circulation is caused. Therefore, the peripheral blood vessel is required to filter emboli in the blood by using a far-end protection device, and then the emboli is conveyed out of the body through a catheter so as to avoid the far-end embolism in the interventional embolectomy.
However, at present, the existing distal protection device for the peripheral blood vessel at least has the problems of poor adherence of the umbrella body structure at the inlet of the elastic filter membrane and poor overall flexibility of the umbrella body structure of the distal protection device. Wherein, the poor adherence at the inlet of the elastic filter membrane is represented as: the umbrella body structure of the existing far-end protection device for the peripheral blood vessel is generally a structure that an elastic filter membrane covers a spindle-shaped frame formed by a plurality of support rods, the inlet end of the elastic filter membrane is supported at multiple points by the contact parts of the elastic filter membrane and the plurality of support rods, and the part of the elastic filter membrane between two adjacent support rods cannot be supported, namely, the part of the structure of the elastic filter membrane is not attached to the wall of the blood vessel, so that the part of the structure of the elastic filter membrane can be bent during filtering, and further part of unfiltered blood can flow to the far end of the blood vessel from the gap between the elastic filter membrane and the wall of the blood vessel to block the far-end blood vessel; the poor flexibility of the whole umbrella body structure of the far-end protection device is caused by that more support rods must be arranged for reducing the leakage amount as much as possible, and the poor flexibility of the umbrella body structure of the far-end protection device for the peripheral blood vessel can cause more damages to the blood vessel in the operation process.
Disclosure of Invention
The invention aims to provide a protective umbrella and a far-end protective device for peripheral blood vessels, which at least solve the technical problems of poor adherence of an umbrella body structure at an inlet of an elastic filter membrane and poor overall flexibility of the umbrella body structure of the far-end protective device in the conventional far-end protective device for the peripheral blood vessels.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a protective umbrella applied to a distal protection device for peripheral blood vessels, including a proximal developing ring, a proximal supporting ring, a supporting beam, and a pocket-shaped elastic filter membrane;
the near ends of the support beams are connected to the near-end developing ring, and the support beams are connected to the near-end support ring at intervals;
the opening edge of the elastic filter membrane is connected to the near-end support ring, and the opening of the elastic filter membrane faces the near-end developing ring;
a developing component is disposed on the proximal support ring, or a developing coating is disposed on the proximal support ring.
In an alternative embodiment, the support beams are all curved, and the distal ends of the support beams are connected to the proximal support ring two by two at intervals.
Further optionally, each of the support beams includes a proximal bending beam and a flat beam, which are integrally connected with each other, a proximal end of the proximal bending beam is connected to the proximal developing ring, a proximal end of the flat beam is connected to a distal end of the proximal bending beam, the proximal support ring is connected to the proximal bending beam and/or the flat beam, and the elastic filter membrane is covered and connected to an inner surface or an outer surface of the plurality of flat beams.
In an alternative embodiment, a fixing ring is provided on each of the support beams, and the proximal end support ring is connected to the plurality of support beams in such a manner as to pass through the fixing ring.
In any of the above optional embodiments, further optionally, the ring body of the proximal support ring comprises a plurality of first wave segments, a plurality of transition segments, and a plurality of second wave segments, wherein: the first wave segments and the second wave segments are alternately arranged, the first wave segments are connected with the adjacent second wave segments through the transition sections, the bending directions of the first wave segments are opposite to that of the second wave segments, and the supporting beams are connected to the wave crests or the wave troughs of the first wave segments or the second wave segments.
In any one of the above optional embodiments, further optionally, the protective umbrella further includes a distal developing ring, the distal ends of the support beams are connected to the distal developing ring, and the elastic filter membrane covers the inner surface or the outer surface connected to the support beams.
Further optionally, each of the support beams respectively comprises a proximal bending beam, a straight beam and a distal bending beam which are integrated and connected in sequence;
the near end of the near end bending beam is connected with the near end developing ring;
the far end of the near end bending beam and/or the near end of the flat beam are/is connected with the near end supporting ring;
the far-end developing ring is arranged in a space formed by the straight beams of the supporting beams in an enclosing mode, and the far ends of the far-end bending beams are connected to the far-end developing ring;
the elastic filter membrane covers the inner or outer surfaces of the straight beam and the proximal support beam connected to the plurality of support beams.
Further optionally, a distal support ring is connected to the distal ends of the plurality of support beams.
Further optionally, a fixing ring is disposed on each of the support beams, and the distal support ring is connected to the plurality of support beams in a manner of penetrating through the fixing ring; and/or the ring body of the distal support ring comprises a plurality of first wave segments, a plurality of transition segments and a plurality of second wave segments, wherein: the first wave segments and the second wave segments are alternately arranged, the first wave segments are connected with the adjacent second wave segments through the transition segments, the bending directions of the first wave segments and the second wave segments are opposite, and the support beam is connected to the wave crest or the wave trough of the first wave segment or the second wave segment; and/or a developing component is connected to the far-end supporting ring or a developing coating is coated on the far-end supporting ring. Wherein "and/or" means that the three structures are arranged at the same time or one or any two structures are combined.
In a second aspect, embodiments of the present invention further provide a distal protection device for a peripheral blood vessel, including a guide wire and a protective umbrella provided in one of the alternative embodiments of the first aspect;
the guide wire penetrates through the near-end developing ring, the guide wire is located at the positions of two sides of the near-end developing ring, the near-end developing ring can wind the guide wire rotates, the near-end developing ring can follow the guide wire is arranged between the two limiting blocks in a reciprocating sliding mode.
The embodiment of the invention can realize the following beneficial effects:
a first aspect of an embodiment of the present invention provides a protective umbrella applied to a distal protection device for peripheral blood vessels, including a proximal developing ring, a proximal support ring, a support beam, and a pocket-shaped elastic filter membrane; the near ends of the support beams are connected to the near-end developing ring, and the support beams are connected to the near-end support ring at intervals; the opening edge of the elastic filter membrane is connected with the near-end support ring, and the opening of the elastic filter membrane faces the near-end developing ring; a developer member is disposed on the proximal support ring or a developer coating is applied to the proximal support ring.
In the embodiment of the invention, the opening of the elastic filter membrane can be supported by arranging the near-end support ring, so that the opening of the elastic filter membrane can be completely attached to the wall of a blood vessel after the protective umbrella is inserted into the blood vessel, namely, the opening of the elastic filter membrane has good adherence, so that embolic substances in blood are completely filtered and intercepted through the elastic filter membrane, and the problems of downstream blood vessel blockage and tissue necrosis due to lack of nutrient substance transportation caused by leakage of the embolic substances between the opening of the elastic filter membrane and the wall of the blood vessel are avoided; in addition, because of having set up the near-end support ring and having good adherence in order to guarantee that elasticity filter membrane opening part has to, can suitably reduce a supporting beam's root number, and then improve the whole compliance of umbrella, do benefit to the umbrella and cross the curvedly and reduce the damage to the vascular wall in the blood vessel, and be convenient for the doctor to adjust the position and the form of umbrella.
In summary, the embodiment of the invention at least alleviates the technical problems of poor adherence of the umbrella structure at the inlet of the elastic filter membrane and poor overall flexibility of the umbrella structure of the far-end protection device in the prior far-end protection device for peripheral blood vessels, and improves the operation safety.
In addition, a second aspect of the embodiments of the present invention provides a distal protection device for a peripheral blood vessel, including a guide wire and the protection umbrella provided in the first aspect; since the distal protection device for a peripheral blood vessel provided by the embodiment of the present invention includes the protective umbrella provided by the first aspect, the distal protection device for a peripheral blood vessel provided by the embodiment of the present invention can achieve all the beneficial effects that the protective umbrella provided by the first aspect can achieve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic overall structure diagram of an alternative implementation of an umbrella according to an embodiment of the present invention;
FIG. 2 is a schematic view of an alternative construction of the umbrella of FIG. 1 after removal of the elastic filter membrane;
FIG. 3 is a schematic view of an alternative construction of the umbrella of FIG. 1 after removal of the elastic filter membrane;
FIG. 4 is a schematic overall view of an alternative embodiment of an umbrella according to an embodiment of the present invention;
FIG. 5 is a schematic view showing the whole structure of the umbrella of FIG. 4 after the elastic filter membrane is removed;
FIG. 6 is a schematic view showing the overall structure of the support beam of FIG. 4;
FIG. 7 is a schematic view showing the overall structure of the proximal support ring or the distal support ring;
FIG. 8 is a schematic view showing the overall structure of the developing member on the proximal support ring or the distal support ring;
fig. 9 is a schematic view showing the overall structure of the distal protection device for peripheral blood vessels formed by assembling the protection umbrella on the guide wire in fig. 4.
Icon: 11-proximal end developer ring; 12-a distal developer ring; 21-a proximal support ring; 22-a distal support ring; 201-a first wave segment; 202-a transition section; 203-a second wave segment; 3-a support beam; 31-a proximal flexure beam; 311-S-shaped connecting section; 312-a proximal straight section; 32-straight beam; 33-distal bending beam; 331-a first distal straight section; 332-a second distal straight section; 4-elastic filter membrane; 5-a developing member; 6-fixing the ring; 71-a guide wire; 72-stop block.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the term "proximal" refers to the end of the body that is closer to the heart of the patient during surgery, i.e., the upstream end of the blood flow, and "distal" refers to the end opposite the "proximal".
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example one
The present embodiment provides a protective umbrella applied to a distal protection device for peripheral blood vessels, which comprises, referring to fig. 1 and 4, a proximal development ring 11, a proximal support ring 21, a support beam 3, and a pocket-like elastic filter membrane 4; the near ends of the support beams 3 are connected to the near-end developing ring 11, and the support beams 3 are connected to the near-end support ring 21 at intervals; the opening edge of the elastic filter membrane 4 is connected with the near-end support ring 21, and the opening of the elastic filter membrane 4 faces the near-end development ring 11; the proximal end support ring 21 is provided with a developing component 5, the developing component 5 may be, but is not limited to, a developing spring as shown in fig. 8, the developing spring is formed by winding a metal that does not project a line, end faces of both ends of the developing spring are polished flat and cannot touch or scratch a blood vessel or an elastic filter membrane 4, the manner of disposing the developing spring on the proximal end support ring 21 includes, but is not limited to, bonding, welding, pressing on the proximal end support ring 21, and the like, or a developing coating is coated on the proximal end support ring 21.
Referring to fig. 9, the umbrella may be assembled to the guide wire 71 to form a distal protection device for peripheral blood vessels by passing the guide wire 71 through the proximal development ring 11 of the umbrella and providing stoppers 72 at both sides of the guide wire 71, wherein the proximal development ring 11 is rotatable around the guide wire 71 and the proximal development ring 11 is slidable back and forth along the guide wire 71 between the stoppers 72. During operation, the peripheral blood vessel is conveyed to the far end of an affected part by the far end protection device by using the guide catheter and the guide wire and is released at a distance of about 2cm-4cm, so as to filter thrombus, the protective umbrella is withdrawn from the body by using the recovery catheter after the operation is finished, specifically, a first perforation is arranged on the front end tube wall of the guide catheter, a second perforation is arranged on the rear end tube wall of the guide catheter, a third perforation is arranged on the rear end tube wall of the recovery catheter, and the conveying and recovery operation steps can be carried out by referring to the following steps:
a conveying step: first, the rear end of the guide wire 71 of the distal end protector for peripheral blood vessels is inserted into the guide catheter from the front end of the guide catheter and passed out of the guide catheter from the second puncture hole, the guide catheter is held by hand, the rear end of the guide wire 71 is pulled until the umbrella is completely pulled into the guide catheter and the distal end of the umbrella is positioned on the rear side of the first puncture hole; then a guide wire is penetrated into the guide catheter from the first perforation, and the front end of the guide wire penetrates out of the front end of the guide catheter; then slowly pushing the guide catheter and the guide wire to the human body, ensuring that the guide wire sends the guide catheter to the far end of the affected part, withdrawing the guide wire after reaching the far end of the affected part, holding the guide wire 71, withdrawing the guide catheter, releasing the protective umbrella and opening the protective umbrella, at the moment, placing a bracket or a catheter and the like on the guide wire 71 to treat the affected part, and filtering the dropped embolus by the opened protective umbrella in the treatment process to prevent the embolus from entering a downstream blood vessel to cause downstream tissue necrosis;
and (3) a recovery step: after the affected part is treated and relevant treatment accessories are withdrawn, the rear end of the guide wire 71 penetrates into the recovery catheter from the front end of the recovery catheter, the rear end of the guide wire 71 penetrates out of the third perforation, the recovery catheter is slowly pushed forwards to enable the protective umbrella containing thrombus to be gradually compressed and coated on the recovery catheter, and then the guide wire 71 and the recovery catheter are withdrawn together from the blood vessel, namely the purpose of recovering the far-end protective device for the peripheral blood vessel is achieved.
In the whole operation process, the proximal developing ring 11 and the developing component 5 arranged on the proximal supporting ring 21 or the developing coating coated on the proximal supporting ring 21 are used as key developing marks for operation reference to determine the releasing and recovering position of the protective umbrella and the inlet position of the elastic filter membrane 4 in the opening state, so that the operation efficiency and the operation safety are improved.
In this embodiment, the opening of the elastic filter membrane 4 can be supported by the proximal support ring 21, so that the opening of the elastic filter membrane 4 can be completely attached to the wall of the blood vessel after the protective umbrella is inserted into the blood vessel, that is, the opening of the elastic filter membrane 4 has good adherence, so as to ensure that the embolic material in the blood is completely filtered and intercepted by the elastic filter membrane 4, thereby avoiding the problems of downstream blood vessel blockage and tissue necrosis due to lack of nutrient substance transportation caused by leakage of the embolic material from the opening of the elastic filter membrane 4 and the wall of the blood vessel; in addition, because of having set up near-end support ring 21 and having good adherence in order to guarantee that 4 openings of elastic filter membrane have to, can suitably reduce a supporting beam 3's root, and then improve the whole compliance of umbrella protection, do benefit to the umbrella and cross the curvedly and reduce the damage to the vascular wall in the blood vessel, and be convenient for the doctor to adjust the position and the form of umbrella protection.
In conclusion, the technical problems that the adherence of the umbrella structure at the inlet of the elastic filter membrane is poor and the whole flexibility of the umbrella structure of the distal end protection device is poor in the prior art in the prior distal end protection device for peripheral blood vessels are relieved by the embodiment, and the operation safety is improved.
Referring to fig. 1 and 2, in an alternative structure of an alternative embodiment of the present embodiment, a plurality of support beams 3 are each curved, and distal ends of the plurality of support beams 3 are connected to a proximal end support ring 21 at intervals; referring to fig. 1 and 3, in another alternative structure, each of the support beams 3 includes a proximal curved beam 31 and a flat beam 32 integrally connected to each other, a proximal end of the proximal curved beam 31 is connected to the proximal developing ring 11, a proximal end of the flat beam 32 is connected to a distal end of the proximal curved beam 31, a proximal support ring 21 is connected to the proximal curved beam 31 and/or the flat beam 32, and an elastic filter 4 is attached to an inner surface or an outer surface of the plurality of flat beams 32. Wherein "the proximal support ring 21 is connected to the proximal curved beam 31 and/or the straight beam 32" means: the proximal support ring 21 is connected to the proximal bending beam 31, or the proximal support ring 21 is connected to the flat beam 32, or the proximal support ring 21 is connected to a portion where the proximal bending beam 31 and the flat beam 32 are connected to each other, i.e., the proximal support ring 21 is connected to both the proximal bending beam 31 and the flat beam 32.
With continued reference to fig. 1-3, in any of the above alternative structures of the present embodiment, further optionally, a fixing ring 6 is provided on each support beam 3, the proximal end support ring 21 is connected to the plurality of support beams 3 in a manner of penetrating through the fixing ring 6, and the fixing ring 6 may be welded to the support beam 3 or formed by bending the support beam 3. In this structure, through setting up solid fixed ring 6, can make when opening or contracting this fender umbrella, directly connected between a supporting beam 3 and the near-end support ring 21, make the in-process that opens and shuts, do not produce relative effort between a supporting beam 3 and the near-end support ring 21, a supporting beam 3 can not lead to near-end support ring 21 to cause big mechanical influence, promptly can not lead to near-end support ring 21 to take place to warp, further improve the adherence of this fender umbrella, further avoid the opening edge of elasticity filter membrane 4 to leak embolic material, in addition, because the in-process that opens and shuts, do not produce relative effort between a supporting beam 3 and the near-end support ring 21, a supporting beam 3 can not cause big mechanical influence to near-end support ring 21, thereby make the whole compliance of fender umbrella unanimous, be favorable to it and cross the curve in the blood vessel.
Referring to fig. 7, in conjunction with fig. 1-3, preferably, the ring body of the proximal support ring 21 includes a plurality of first wave segments 201, a plurality of transition segments 202, and a plurality of second wave segments 203, wherein: the first wave segments 201 and the second wave segments 203 are alternately arranged, the first wave segments 201 are connected with the adjacent second wave segments 203 through transition segments 202, the bending directions of the first wave segments 201 and the second wave segments 203 are opposite, and the support beam 3 is connected to the wave crests or the wave troughs of the first wave segments 201 or the second wave segments 203. With the structure, when the protective umbrella is opened or contracted, the supporting beam 3 can drive the first wave section 201 and the second wave section 203 to open and close along the V-shaped contour, so as to be convenient for operation.
Referring to fig. 4 and 5, in an alternative embodiment of this embodiment, the umbrella further preferably includes a distal development ring 12, the distal ends of the support beams 3 are connected to the distal development ring 12, and the elastic filter membrane 4 covers the inner or outer surface of the support beams 3. Through setting up distal end development ring 12, be favorable to operating the doctor and in time know the whole length of umbrella to accurate definite position and the form that it stretched into in the blood vessel, during the specific application, the guide wire 71 in the umbrella subassembly assembly body of protection passes near-end development ring 11 and distal end development ring 12 in proper order.
Referring to fig. 5 and 6, it is further preferred that each support beam 3 comprises a respective proximal bending beam 31, a straight beam 32 and a distal bending beam 33, which are integrally and sequentially connected. Wherein: the proximal end of the proximal bending beam 31 is connected to the proximal development ring 11; the distal end of the proximal curved beam 31 and/or the proximal end of the straight beam 32 is connected to the proximal support ring 21; the distal developing ring 12 is disposed in a space surrounded by the straight beams 32 of the plurality of support beams 3, and the distal ends of the distal bending beams 33 are connected to the distal developing ring 12; the elastic filter membrane 4 covers the inner or outer surfaces of the straight beam 32 connected to the plurality of support beams 3 and the proximal support beam 3. "the distal end of the proximal bending beam 31 and/or the proximal end of the flat beam 32 is connected to the proximal support ring 21" means that the proximal support ring 21 may be connected to the distal end of the proximal bending beam 31, or to the proximal end of the flat beam 32, or to a portion where the distal end of the proximal bending beam 31 and the proximal end of the flat beam 32 are connected to each other. In this embodiment, since the distal developing ring 12 is disposed in the space surrounded by the straight beams 32 of the supporting beams 3, the supporting beams 3 form a skeleton recessed inside the space surrounded by the straight beams 32 of the supporting beams 3 at the distal end of the umbrella, and compared with the umbrella structure of the distal protection device for peripheral blood vessels in the spindle-shaped frame formed by the supporting beams covered by the elastic filter membrane in the prior art, the distal thrombus capacity is increased, so that the overall length of the umbrella structure of the distal protection device is shortened, the umbrella provided in this embodiment can be applied to a scene with a short anchoring area, the applicability of the umbrella is improved, and meanwhile, compared with the umbrella structure of the distal protection device for peripheral blood vessels in the spindle-shaped frame formed by the supporting beams covered by the elastic filter membrane in the prior art, the umbrella structure has a long length after contraction, and is withdrawn from more release catheters during release, when the protective umbrella provided by the embodiment is contracted, the far end is contracted towards the space formed by the enclosure of the straight beams 32 of the plurality of supporting beams 3, so that the far-end protective device is more favorably released and recovered, and the safety of the operation is further improved.
To enhance the above function, referring to fig. 6, it is further preferable that the distal bending beam 33 includes a first distal straight section 331 and a second distal straight section 332, a proximal end of the first distal straight section 331 is connected to a distal end of the straight beam 32, a distal end of the first distal straight section 331 is connected to a proximal end of the second distal straight beam 32, a distal end of the second distal straight section 332 is connected to the distal developer ring 12, the second distal straight section 332 is parallel to the straight beam 32, and an included angle between the first distal straight section 331 and the straight beam 32 is an acute angle.
In this embodiment, the space surrounded by the straight beams 32 of the plurality of support beams 3 may be a straight cylindrical structure, a tapered structure with a diameter gradually decreasing from the proximal end to the distal end, or other structures, which is not limited herein.
Referring to fig. 6, in an alternative embodiment of the present embodiment, the proximal bending beam 31 includes an S-shaped connecting section 311 and a proximal straight section 312, one end of the S-shaped connecting section 311 is connected to the proximal end of the straight beam 32, the other end of the S-shaped connecting section 311 is connected to the proximal straight section 312, and the other end of the proximal straight section 312 is connected to the proximal developing ring 11. Through the structure arrangement, compared with the umbrella body structure of the distal protection device for the peripheral blood vessel, in the prior art, the elastic filter membrane is covered on the fusiform frame consisting of a plurality of support rods, the proximal invalid axial length is shortened, the axial length of the proximal end of the protection umbrella is further reduced, the protection umbrella can be applied to the peripheral blood vessel which is shorter, has a shorter, more circuitous or knotted blood vessel in the downstream anchoring area of an embolism part, such as a renal artery, and can be simultaneously applied to a longer or shorter anchoring area.
With continued reference to fig. 5, it is further preferred that a distal support ring 22 is further connected to the distal ends of the support beams 3, so that the adherence of the umbrella can be further improved by the distal support ring 22, and the filter plug volume of the elastic filter membrane 4 can be increased.
Still further preferably, a fixing ring 6 is provided on each of the support beams 3, and the distal end support ring 22 is connected to the plurality of support beams 3 in such a manner as to pass through the fixing ring 6; and/or, referring to fig. 7, the ring body of the distal support ring 22 comprises a plurality of first wave segments 201, a plurality of transition segments 202, and a plurality of second wave segments 203, wherein: the first wave segment 201 and the second wave segment 203 are alternately arranged, the first wave segment 201 is connected with the adjacent second wave segment 203 through a transition segment 202, the bending directions of the first wave segment 201 and the second wave segment 203 are opposite, and the support beam 3 is connected to the wave crest or the wave trough of the first wave segment 201 or the second wave segment 203; and/or, a developing component 5 is connected on the far-end supporting ring 22 or a developing coating is coated on the far-end supporting ring 22. Wherein "and/or" means "and/or" preceding structure is provided simultaneously or alternatively to "and/or" following structure. The functional effects that the above structure can achieve are obtained with reference to the aforementioned proximal end support ring 21. Preferably, the developing member 5 is disposed on the transition section 202 of the proximal support ring 21 and the distal support ring 22, and the developing member 5 preferably adopts a developing spring, which covers almost the entire support rings, so as to ensure that the umbrella has a clearer developing effect.
Example two
The present embodiment provides a distal protection device for a peripheral blood vessel, which includes a guide wire 71 and a protective umbrella according to any one of the alternative embodiments of the present embodiment, as shown in fig. 9. The guide wire 71 penetrates through the proximal development ring 11, the positions of the guide wire 71, which are located at two sides of the proximal development ring 11, are provided with the limit blocks 72, the proximal development ring 11 can rotate around the guide wire 71, and the proximal development ring 11 can slide between the two limit blocks 72 back and forth along the guide wire 71.
In this embodiment, the stop 72 can be, but is not limited to being, welded to the guidewire 71.
Since the distal protection device for a peripheral blood vessel provided by the present embodiment includes the protection umbrella described in the first embodiment, the distal protection device for a peripheral blood vessel provided by the present embodiment can achieve all the advantages that the protection umbrella can achieve in the first embodiment, and the specific structure, the operation manner, and the achievable effects can be obtained with reference to the optional or preferred embodiments in the first embodiment.
Finally, it should be noted that:
1. in the present specification, "and/or" means "and/or" the preceding structure is provided simultaneously with or alternatively to or in selective combination with "and/or" the following structure;
2. the embodiments in the present description are all described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments can be referred to each other; the above embodiments in the present specification are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158236.8A CN112773461B (en) | 2021-02-04 | 2021-02-04 | Distal protection devices for protective umbrellas and peripheral blood vessels |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158236.8A CN112773461B (en) | 2021-02-04 | 2021-02-04 | Distal protection devices for protective umbrellas and peripheral blood vessels |
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| Publication Number | Publication Date |
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| CN112773461A true CN112773461A (en) | 2021-05-11 |
| CN112773461B CN112773461B (en) | 2025-06-20 |
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| CN202110158236.8A Active CN112773461B (en) | 2021-02-04 | 2021-02-04 | Distal protection devices for protective umbrellas and peripheral blood vessels |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114305590A (en) * | 2022-03-16 | 2022-04-12 | 北京华脉泰科医疗器械股份有限公司 | Far-end protector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2827152A1 (en) * | 2001-07-13 | 2003-01-17 | Braun Medical | Blood clot filter for use in angioplasty comprises radially expandable membrane with inner supporting filaments |
| US6544279B1 (en) * | 2000-08-09 | 2003-04-08 | Incept, Llc | Vascular device for emboli, thrombus and foreign body removal and methods of use |
| CN214761330U (en) * | 2021-02-04 | 2021-11-19 | 北京华脉泰科医疗器械股份有限公司 | Protective umbrella and distal protective device for peripheral blood vessel |
-
2021
- 2021-02-04 CN CN202110158236.8A patent/CN112773461B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6544279B1 (en) * | 2000-08-09 | 2003-04-08 | Incept, Llc | Vascular device for emboli, thrombus and foreign body removal and methods of use |
| FR2827152A1 (en) * | 2001-07-13 | 2003-01-17 | Braun Medical | Blood clot filter for use in angioplasty comprises radially expandable membrane with inner supporting filaments |
| CN214761330U (en) * | 2021-02-04 | 2021-11-19 | 北京华脉泰科医疗器械股份有限公司 | Protective umbrella and distal protective device for peripheral blood vessel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114305590A (en) * | 2022-03-16 | 2022-04-12 | 北京华脉泰科医疗器械股份有限公司 | Far-end protector |
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| CN112773461B (en) | 2025-06-20 |
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